/*
 * The contents of this file are subject to the terms 
 * of the Common Development and Distribution License 
 * (the License).  You may not use this file except in
 * compliance with the License.
 * 
 * You can obtain a copy of the license at 
 * https://glassfish.dev.java.net/public/CDDLv1.0.html or
 * glassfish/bootstrap/legal/CDDLv1.0.txt.
 * See the License for the specific language governing 
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL 
 * Header Notice in each file and include the License file 
 * at glassfish/bootstrap/legal/CDDLv1.0.txt.  
 * If applicable, add the following below the CDDL Header, 
 * with the fields enclosed by brackets [] replaced by
 * you own identifying information: 
 * "Portions Copyrighted [year] [name of copyright owner]"
 * 
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 */

/*
 * $Id: ConfigMBean.java,v 1.3 2005/12/25 03:42:13 tcfujii Exp $
 */

package com.sun.enterprise.admin.mbeans;

import java.lang.IllegalArgumentException;

//JMX imports
import javax.management.AttributeList;
import javax.management.Attribute;
import javax.management.MBeanException;
import javax.management.ReflectionException;
import javax.management.AttributeNotFoundException;

import com.sun.enterprise.admin.meta.MBeanRegistryFactory;

//event handling
import com.sun.enterprise.admin.event.EventContext;
import com.sun.enterprise.admin.event.DynamicReconfigEvent;

//config imports
import com.sun.enterprise.admin.config.BaseConfigMBean;
import com.sun.enterprise.config.serverbeans.ServerTags;
import com.sun.enterprise.admin.AdminContext;

// Logging
import java.util.logging.Level;

import com.sun.enterprise.admin.servermgmt.pe.PEInstancesManager;
import com.sun.enterprise.admin.servermgmt.RepositoryConfig;
import com.sun.enterprise.admin.servermgmt.RuntimeStatus;
import com.sun.enterprise.admin.servermgmt.InstanceException;
import com.sun.enterprise.util.SystemPropertyConstants;
import com.sun.enterprise.util.i18n.StringManager;

public class ConfigMBean extends BaseConfigMBean
{
    
     /****************************************************************************************************************
     * Hook for standard setAttributes() to detect change for 
     * dynamic-reconfiguration-enabled attribute Sets the values of several MBean's attributes.
     * @param attrList A list of attributes: The identification of the attributes to be set and the values they are to be set to.
     * @return The list of attributes that were set, with their new values.
     */
    public AttributeList setAttributes(AttributeList list) {
            
            boolean bEnabled = false;
            int reconfigIdx = -1;
            if(list!=null)
                for(int i=0; i<list.size(); i++)
                {
                    Attribute attr = (Attribute)list.get(i);
                    if(ServerTags.DYNAMIC_RECONFIGURATION_ENABLED.equals(attr.getName()))
                    {
                        try {
                            bEnabled = validateDynamicReconfigEvent(attr.getValue());
                        } catch(Exception e) {
                            reconfigIdx = i;
                        }
                    }
                       
                }

            if (reconfigIdx != -1) {
                list.remove(reconfigIdx);
            }
            //then, call super to perform operation
            list = super.setAttributes(list);

            if (reconfigIdx != -1) {
                return list;
            }

            //now analyse if dynamic-reconfiguration-enabled attribute changed
            if(list!=null)
                for(int i=0; i<list.size(); i++)
                {
                    Attribute attr = (Attribute)list.get(i);
                    if(ServerTags.DYNAMIC_RECONFIGURATION_ENABLED.equals(attr.getName()))
                    {
                        emitDynamicReconfigEvent(bEnabled);
                    }
                       
                }
            return list;
    }

    /**
     * Set the value of a specific attribute of this MBean.
     *
     * @param attr The identification of the attribute to be set
     *  and the new value
     *
     * @exception AttributeNotFoundException if this attribute is not
     *  supported by this MBean
     * @exception MBeanException if the initializer of an object
     *  throws an exception
     * @exception ReflectionException if a Java reflection exception
     *  occurs when invoking the getter
     */
    public void setAttribute(Attribute attr)
        throws AttributeNotFoundException, MBeanException, ReflectionException
    {
        boolean bEnabled = false;
        //first analyse if dynamic-reconfiguration-enabled attribute changed
        if(ServerTags.DYNAMIC_RECONFIGURATION_ENABLED.equals(attr.getName()))
        {
            bEnabled = validateDynamicReconfigEvent(attr.getValue());
        }
        //next, call super to perform operation
        super.setAttribute(attr);
        if(ServerTags.DYNAMIC_RECONFIGURATION_ENABLED.equals(attr.getName()))
        {
            emitDynamicReconfigEvent(bEnabled);
        }
    }
    
    private boolean validateDynamicReconfigEvent(Object value) throws IllegalArgumentException, MBeanException
    {
        boolean bEnabled = false;
        if(value instanceof Boolean)
            bEnabled = ((Boolean)value).booleanValue();
        else
            if("true".equalsIgnoreCase(value.toString()) || 
               "yes".equalsIgnoreCase(value.toString()) )
                bEnabled = true;

        boolean restartRequired = false;
        try {
            restartRequired = getRuntimeStatus().isRestartNeeded();
        } catch(InstanceException ie) {
            throw new MBeanException(ie);
        }

        if((bEnabled == true) && ( restartRequired == true)) {
            String msg = _strMgr.getString(
                "admin.mbeans.configMBean.serverRequiresRestart");
            Exception e = new Exception(msg);
            throw new MBeanException(e,msg);
        }

        return bEnabled;
    }
    private void emitDynamicReconfigEvent(boolean bEnabled)
    {
        try
        {
            AdminContext adminContext = MBeanRegistryFactory.getAdminContext();
            String instanceName = adminContext.getServerName();
            int action = bEnabled?DynamicReconfigEvent.ACTION_ENABLED:DynamicReconfigEvent.ACTION_DISABLED;
            DynamicReconfigEvent event = new DynamicReconfigEvent(instanceName, action);
            String configName = (String)getAttribute(ServerTags.NAME);
            event.setTargetDestination(configName);
            EventContext.addEvent(event);
        } 
        catch (Exception e) 
        {
            e.printStackTrace();

            //throw new MBeanException(e.getMessage(), e);
        }
    }

    private RuntimeStatus getRuntimeStatus() throws InstanceException
    {        
        String serverName = 
            System.getProperty(SystemPropertyConstants.SERVER_NAME);
        PEInstancesManager manager = new PEInstancesManager(new RepositoryConfig());
        return RuntimeStatus.getRuntimeStatus(serverName, manager);        
    }
    ///////////////////////////////////////////////////////////////////////////
	
	private static final	StringManager	_strMgr = 
                StringManager.getManager(ConfigMBean.class);
	///////////////////////////////////////////////////////////////////////////

}
